WO2018128503A1

WO2018128503A1 - Method for transmitting or receiving data in wireless communication system, and device therefor

Info

Publication number: WO2018128503A1
Application number: PCT/KR2018/000365
Authority: WO
Inventors: 신석민; 고현수; 김은선; 김기준; 서인권; 박창환; 이윤정
Original assignee: 엘지전자(주)
Priority date: 2017-01-06
Filing date: 2018-01-08
Publication date: 2018-07-12

Abstract

The present invention provides a method for transmitting or receiving data in a wireless communication system, and a device therefor. Specifically, a method for receiving system information by a terminal may comprise the steps of: receiving first system information through a first physical channel; and receiving second system information through a second physical channel, wherein the second system information is remaining system information obtained after excluding the first system information from system information for the terminal, the second physical channel is scheduled through the first physical channel, and a beam configured to receive the first physical channel is the same as a beam configured to receive the second physical channel.

Description

Method for transmitting and receiving data in a wireless communication system and apparatus therefor

The present invention relates to a wireless communication system, and more particularly, to a method for transmitting and receiving data by a terminal and an apparatus supporting the same.

Mobile communication systems have been developed to provide voice services while ensuring user activity. However, the mobile communication system has expanded not only voice but also data service, and the explosive increase in traffic causes shortage of resources and users require faster services. Therefore, a more advanced mobile communication system is required. .

The requirements of the next generation of mobile communication systems will be able to accommodate the explosive data traffic, dramatically increase the data rate per user, greatly increase the number of connected devices, very low end-to-end latency, and high energy efficiency. It should be possible. Dual connectivity, Massive Multiple Input Multiple Output (MIMO), In-band Full Duplex, Non-Orthogonal Multiple Access (NOMA), Super Various technologies such as wideband support and device networking have been studied.

The present specification proposes a method and apparatus for transmitting and receiving data in a wireless communication system.

More specifically, the present specification proposes a method of scheduling a specific channel for transmitting system information without using downlink control information.

In addition, the present specification proposes a method of scheduling a specific channel for transmitting system information using downlink control information.

In addition, the present specification proposes a method of transmitting a common control signal for one or more terminals in a 6 GHz or lower band (Below 6 GHz).

In addition, the present specification proposes a method for transmitting a common control signal for one or more terminals in a 6 GHz band (Above 6 GHz).

The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned above will be clearly understood by those skilled in the art from the following description. Could be.

In a method of receiving system information by a terminal in a wireless communication system according to an embodiment of the present invention, the method may include receiving first system information through a first physical channel; And receiving second system information through a second physical channel, wherein the second system information is remaining system information except for the first system information among system information for the terminal. The second physical channel is scheduled through the first physical channel, and a beam configured to receive the first physical channel is the same as a beam configured to receive the second physical channel. can do.

In the method according to an embodiment of the present invention, the first physical channel is transmitted by being time division multiplexed with a synchronization signal, and the second physical channel is transmitted by the first physical channel. It may be transmitted in a specific resource region established through a physical channel.

In the method according to an embodiment of the present invention, the synchronization signal includes a primary synchronization signal and a primary synchronization signal, and the synchronization signal and the first physical channel. May be set as a synchronization signal block.

In the method according to an embodiment of the present invention, the resource region to which the sync signal block is transmitted includes a resource region to which paging control information for scheduling a paging signal and frequency division is transmitted. Can be multiplexed.

In the method according to an embodiment of the present invention, the beam index order of beam sweeping applied to the transmission of the first physical channel is applied to the transmission of the second physical channel. It may be the same as the beam index order of the beam sweeping.

In the method according to an embodiment of the present invention, the first physical channel includes information indicating a resource region to which downlink control information for scheduling the second physical channel is transmitted. The method may further include identifying the specific resource region to which the second physical channel is allocated by receiving the downlink control information.

In addition, in the method according to an embodiment of the present disclosure, the specific resource region to which the second physical channel is allocated may be indicated based on the first system information and a cell identifier.

In the method according to an embodiment of the present invention, a resource region to which paging control information for scheduling a paging signal is transmitted is frequency division multiplexed with the first physical channel. The resource region to which the paging signal is delivered may be frequency division multiplexed with the second physical channel.

In a terminal for receiving system information in a wireless communication system according to an embodiment of the present invention, the terminal includes a transceiver for transmitting and receiving a radio signal and a processor functionally connected to the transceiver; The processor may be configured to receive first system information through a first physical channel and to receive second system information through a second physical channel, wherein the second system information includes the terminal. Remaining system information except for the first system information among the system information for the second (Remaining system information), the second physical channel is scheduled via the first physical channel (scheduling), to receive the first physical channel The beam configured for this may be the same as the beam configured for receiving the second physical channel.

According to an embodiment of the present invention, since the terminal receives system information through a plurality of channels (or signals), there is an effect that the complexity of the system information transmission may be lowered.

In addition, according to an embodiment of the present invention, when the terminal receives the remaining system information (or the remaining control information) after receiving a portion of the system information (or control information), an additional beam sweeping operation (beam sweeping operation) As not performed, the complexity of the terminal is reduced.

In addition, according to an embodiment of the present invention, even if the terminal does not receive specific information (eg, system information, control information), the terminal can perform a normal operation through a preset default operation mode (default operation mode) It has an effect.

The effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the following description. .

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included as part of the detailed description in order to provide a thorough understanding of the present invention, provide embodiments of the present invention and together with the description, describe the technical features of the present invention.

Figure 1 shows an example of the overall system structure of the NR to which the method proposed in this specification can be applied.

2 illustrates a relationship between an uplink frame and a downlink frame in a wireless communication system to which the method proposed in the present specification may be applied.

3 illustrates an example of a resource grid supported by a wireless communication system to which the method proposed in the present specification can be applied.

4 shows examples of an antenna port and a neuralology-specific resource grid to which the method proposed in this specification can be applied.

5 shows an example of a self-contained subframe structure to which the method proposed in this specification can be applied.

6 shows an example of an s-PBCH and a paging transmission method to which the method proposed in the present specification can be applied.

7 shows another example of an s-PBCH and a paging transmission method to which the method proposed in the present specification can be applied.

8 illustrates an example of an operation flowchart of a terminal receiving system information in a wireless communication system to which the method proposed in this specification can be applied.

9 shows another example of an s-PBCH and a paging transmission method to which the method proposed in the present specification can be applied.

10 shows another example of an s-PBCH and a paging transmission method to which the method proposed in the present specification can be applied.

11 shows another example of an s-PBCH and a paging transmission method to which the method proposed in the present specification can be applied.

12 shows another example of an s-PBCH and a paging transmission method to which the method proposed in this specification can be applied.

FIG. 13 illustrates a block diagram of a wireless communication device to which the methods proposed herein can be applied.

14 is a block diagram illustrating a communication device according to one embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The detailed description, which will be given below with reference to the accompanying drawings, is intended to explain exemplary embodiments of the present invention and is not intended to represent the only embodiments in which the present invention may be practiced. The following detailed description includes specific details in order to provide a thorough understanding of the present invention. However, one of ordinary skill in the art appreciates that the present invention may be practiced without these specific details.

In some instances, well-known structures and devices may be omitted or shown in block diagram form centering on the core functions of the structures and devices in order to avoid obscuring the concepts of the present invention.

In this specification, a base station has a meaning as a terminal node of a network that directly communicates with a terminal. The specific operation described as performed by the base station in this document may be performed by an upper node of the base station in some cases. That is, it is obvious that various operations performed for communication with a terminal in a network composed of a plurality of network nodes including a base station may be performed by the base station or other network nodes other than the base station. The term 'base station (BS)' refers to a fixed station, a Node B, an evolved-NodeB (eNB), a base transceiver system (BTS), an access point (AP), and a general NB (gNB). Can be replaced by In addition, a 'terminal' may be fixed or mobile, and may include a user equipment (UE), a mobile station (MS), a user terminal (UT), a mobile subscriber station (MSS), a subscriber station (SS), and an AMS ( Advanced Mobile Station (WT), Wireless Terminal (WT), Machine-Type Communication (MTC) Device, Machine-to-Machine (M2M) Device, Device-to-Device (D2D) Device, etc.

Hereinafter, downlink (DL) means communication from a base station to a terminal, and uplink (UL) means communication from a terminal to a base station. In downlink, a transmitter may be part of a base station, and a receiver may be part of a terminal. In uplink, a transmitter may be part of a terminal and a receiver may be part of a base station.

Specific terms used in the following description are provided to help the understanding of the present invention, and the use of such specific terms may be changed to other forms without departing from the technical spirit of the present invention.

The following techniques are code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), and NOMA It can be used in various radio access systems such as non-orthogonal multiple access. CDMA may be implemented by a radio technology such as universal terrestrial radio access (UTRA) or CDMA2000. TDMA may be implemented with wireless technologies such as global system for mobile communications (GSM) / general packet radio service (GPRS) / enhanced data rates for GSM evolution (EDGE). OFDMA may be implemented in a wireless technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, evolved UTRA (E-UTRA). UTRA is part of a universal mobile telecommunications system (UMTS). 3rd generation partnership project (3GPP) long term evolution (LTE) is a part of evolved UMTS (E-UMTS) using E-UTRA, and employs OFDMA in downlink and SC-FDMA in uplink. LTE-A (advanced) is the evolution of 3GPP LTE.

Embodiments of the present invention may be supported by standard documents disclosed in at least one of IEEE 802, 3GPP, and 3GPP2, which are wireless access systems. That is, steps or parts which are not described to clearly reveal the technical spirit of the present invention among the embodiments of the present invention may be supported by the above documents. In addition, all terms disclosed in the present document can be described by the above standard document.

For clarity, the following description focuses on 3GPP LTE / LTE-A / NR (New RAT), but the technical features of the present invention are not limited thereto.

As the spread of smart phones and IoT (Internet of Things) terminals is rapidly spreading, the amount of information exchanged through a communication network is increasing. As a result, next-generation wireless access technologies can provide faster service to more users than traditional communication systems (or traditional radio access technologies) (e.g., enhanced mobile broadband communication). )) Needs to be considered.

To this end, a design of a communication system considering a machine type communication (MTC) that provides a service by connecting a plurality of devices and objects has been discussed. In addition, a design of a communication system (eg, Ultra-Reliable and Low Latency Communication (URLLC)) that considers a service and / or terminal sensitive to communication reliability and / or latency is also considered. Is being discussed.

In the following specification, for convenience of description, the next generation radio access technology is referred to as NR (New RAT), and the radio communication system to which the NR is applied is referred to as an NR system.

용어 정의Term Definition

eLTE eNB: An eLTE eNB is an evolution of an eNB that supports connectivity to EPC and NGC.

gNB: Node that supports NR as well as connection with NGC.

New RAN: A radio access network that supports NR or E-UTRA or interacts with NGC.

Network slice: A network slice defined by the operator to provide an optimized solution for specific market scenarios that require specific requirements with end-to-end coverage.

Network function: A network function is a logical node within a network infrastructure with well-defined external interfaces and well-defined functional behavior.

NG-C: Control plane interface used for the NG2 reference point between the new RAN and NGC.

NG-U: User plane interface used for the NG3 reference point between the new RAN and NGC.

Non-standalone NR: A deployment configuration where a gNB requires an LTE eNB as an anchor for control plane connection to EPC or an eLTE eNB as an anchor for control plane connection to NGC.

Non-Standalone E-UTRA: Deployment configuration in which the eLTE eNB requires gNB as an anchor for control plane connection to NGC.

User plane gateway: The endpoint of the NG-U interface.

시스템 일반System general

1 is a view showing an example of the overall system structure of the NR to which the method proposed in this specification can be applied.

Referring to Figure 1, the NG-RAN consists of gNBs that provide control plane (RRC) protocol termination for the NG-RA user plane (new AS sublayer / PDCP / RLC / MAC / PHY) and UE (User Equipment). do.

The gNBs are interconnected via an Xn interface.

The gNB is also connected to the NGC via an NG interface.

More specifically, the gNB is connected to an Access and Mobility Management Function (AMF) through an N2 interface and to a User Plane Function (UPF) through an N3 interface.

NR(New Rat) 뉴머롤로지(Numerology) 및 프레임(frame) 구조NR (New Rat) Numerology and Frame Structure

Multiple numerologies can be supported in an NR system. Here, the numerology may be defined by subcarrier spacing and cyclic prefix overhead. In this case, the plurality of subcarrier intervals may be represented by an integer N (or,

Can be derived by scaling. Further, even if it is assumed that very low subcarrier spacing is not used at very high carrier frequencies, the used numerology may be selected independently of the frequency band.

In addition, in the NR system, various frame structures according to a number of numerologies may be supported.

Hereinafter, an Orthogonal Frequency Division Multiplexing (OFDM) neurology and frame structure that can be considered in an NR system will be described.

Multiple OFDM numerologies supported in the NR system may be defined as shown in Table 1.

With regard to the frame structure in the NR system, the size of the various fields in the time domain

Is expressed as a multiple of the time unit. From here,

ego,

to be. Downlink and uplink transmissions

It consists of a radio frame having a section of (radio frame). Here, each radio frame is

It consists of 10 subframes having a section of. In this case, there may be a set of frames for uplink and a set of frames for downlink.

As shown in FIG. 2, the transmission of an uplink frame number i from a user equipment (UE) is greater than the start of the corresponding downlink frame at the corresponding UE.

You must start before.

Numerology

For slots, slots within a subframe

Numbered in increasing order of within a radio frame

They are numbered in increasing order of. One slot

Consists of consecutive OFDM symbols of,

Is determined according to the numerology and slot configuration used. Slot in subframe

Start of OFDM symbol in the same subframe

Is aligned with the beginning of time.

Not all terminals can transmit and receive at the same time, which means that not all OFDM symbols of a downlink slot or an uplink slot can be used.

Table 2 shows numerology

Shows the number of OFDM symbols per slot for a normal CP in Table 3,

This indicates the number of OFDM symbols per slot for the extended CP in.

NR 물리 자원(NR Physical Resource)NR Physical Resource

In relation to physical resources in the NR system, an antenna port, a resource grid, a resource element, a resource block, a carrier part, etc. Can be considered.

Hereinafter, the physical resources that may be considered in the NR system will be described in detail.

First, with respect to the antenna port, the antenna port is defined so that the channel on which the symbol on the antenna port is carried can be inferred from the channel on which another symbol on the same antenna port is carried. If the large-scale property of a channel carrying a symbol on one antenna port can be deduced from the channel carrying the symbol on another antenna port, then the two antenna ports are quasi co-located or QC / QCL. quasi co-location relationship. Here, the wide range characteristics include one or more of delay spread, Doppler spread, frequency shift, average received power, and received timing.

3 shows an example of a resource grid supported by a wireless communication system to which the method proposed in the present specification can be applied.

Referring to Figure 3, the resource grid is in the frequency domain

By way of example, one subframe includes 14 x 2 ^u OFDM symbols, but is not limited thereto.

In an NR system, the transmitted signal is

One or more resource grids composed of subcarriers, and

Is described by the OFDM symbols of. From here,

to be. remind

Denotes the maximum transmission bandwidth, which may vary between uplink and downlink as well as numerologies.

In this case, as shown in Figure 4, the numerology

And one resource grid for each antenna port p.

Numerology

And each element of the resource grid for antenna port p is referred to as a resource element and is an index pair

Uniquely identified by From here,

Is the index on the frequency domain,

Refers to the position of a symbol within a subframe. Index pair when referring to a resource element in a slot

This is used. From here,

to be.

Numerology

Resource elements for antenna and antenna port p

Is a complex value

Corresponds to If there is no risk of confusion, or if no specific antenna port or numerology is specified, the indices p and

Can be dropped, so the complex value is

or

This can be

In addition, the physical resource block (physical resource block) is in the frequency domain

It is defined as consecutive subcarriers. On the frequency domain, the physical resource blocks can be zero

Numbered until. At this time, a physical resource block number on the frequency domain

And resource elements

The relationship between is given by Equation 1.

In addition, with respect to a carrier part, the terminal may be configured to receive or transmit using only a subset of the resource grid. At this time, the set of resource blocks set to be received or transmitted by the UE is from 0 on the frequency domain.

Numbered until.

Self-contained 서브프레임 구조Self-contained subframe structure

The TDD (Time Division Duplexing) structure considered in the NR system is a structure that processes both uplink (UL) and downlink (DL) in one subframe. This is to minimize latency of data transmission in the TDD system, and the structure is referred to as a self-contained subframe structure.

5 shows an example of a self-contained subframe structure to which the method proposed in this specification can be applied. 5 is merely for convenience of description and does not limit the scope of the present invention.

Referring to FIG. 5, as in legacy LTE, it is assumed that one subframe includes 14 orthogonal frequency division multiplexing (OFDM) symbols.

In FIG. 5, an area 502 means a downlink control region, and an area 504 means an uplink control region. Also, regions other than regions 502 and 504 (that is, regions without a separate indication) may be used for transmission of downlink data or uplink data.

That is, uplink control information and downlink control information are transmitted in one self-contained subframe. On the other hand, in the case of data, uplink data or downlink data is transmitted in one self-contained subframe.

When using the structure shown in FIG. 5, within one self-contained subframe, downlink transmission and uplink transmission may proceed sequentially, and transmission of downlink data and reception of uplink ACK / NACK may be performed. .

As a result, when an error in data transmission occurs, the time required for retransmission of data can be reduced. In this way, delays associated with data delivery can be minimized.

In the self-contained subframe structure as shown in FIG. 5, a base station (eNodeB, eNB, gNB) and / or a terminal (user equipment (UE)) switches from a transmission mode to a reception mode. A time gap is required for the process or the process of switching from the reception mode to the transmission mode. In relation to the time gap, when uplink transmission is performed after downlink transmission in the self-contained subframe, some OFDM symbol (s) may be set to a guard period (GP).

아날로그 빔포밍(analog beamforming)Analog beamforming

In a millimeter wave (mmWave, mmW) communication system, as the wavelength of a signal is shortened, multiple (or multiple) antennas may be installed in the same area. For example, in the 30CHz band, the wavelength is about 1cm, and when the antennas are installed at 0.5 lambda intervals on a panel of 5cm x 5cm according to the 2-dimension arrangement, a total of 100 Antenna elements may be installed.

Accordingly, in the mmW communication system, a method of increasing coverage or increasing throughput may be considered by increasing beamforming (BF) gain using a plurality of antenna elements.

At this time, when a TXRU (Transceiver Unit) is installed to enable transmission power and phase adjustment for each antenna element, independent beamforming is possible for each frequency resource.

However, the method of installing TXRU in all antenna elements (eg, 100 antenna elements) may be ineffective in terms of price. Accordingly, a method of mapping a plurality of antenna elements to one TXRU and controlling the direction of the beam by using an analog phase shifter may be considered.

Since the analog beamforming method as described above can generate only one beam direction in all bands, a problem arises in that the frequency selective beam operation cannot be performed.

Accordingly, hybrid beamforming with B TXRUs, which is less than Q antenna elements, may be considered as an intermediate form between digital beamforming and analog beamforming. In this case, although there is a difference depending on the connection scheme of the B TXRU and Q antenna elements, the direction of the beam capable of transmitting signals at the same time may be limited to B or less.

In the present specification, a method and operation of delivering system information and / or control information in a next generation wireless communication system (ie, NR system) are described.

In this case, a physical signal and / or a physical channel used in the system are NR-PS (NR-Primary Synchronization signal) to which 'NR-' is added to distinguish from a legacy LTE system. NR-Secondary Synchronization Signal (NR-SSS), NR-Physical Broadcast Channel (NR-PBCH), NR-Physical Downlink Control Channel (NR-PDCCH) / NR-EPDCCH (NR-Enhanced PDCCH), NR-PDSCH (NR-PSCH) -Physical Downlink Shared Channel) or the like.

Signals required in an initial access procedure of an existing LTE system (ie, a legacy LTE system) are set to be transmitted using a fixed period, a fixed time and / or frequency resource, and the like. Here, the signals required in the initial access procedure may include a master information block (MIB) transmitted through PSS, SSS, PBCH, and / or DCI scheduling PDSCH for transmitting system information block (SIB) -1. . Similarly, in the NR system, the NR-PSS, the NRSSS, and the NR-PBCH may be preferably set to transmit using a fixed period, a fixed time and / or frequency resource, and the like.

However, in the NR system, there is no common search space (CSS) that can be viewed (that is, monitored) by all terminals in the cell. Therefore, unlike the existing LTE system, in the NR system, it may be difficult to schedule a signal such as SIB-1 transmitted through the PDSCH.

In this regard, in the initial access procedure in the NR system, the NR terminal uses NR-PSS and NR-SSS to perform downlink time and / or frequency synchronization with a base station and a cell identifier (Cell). ID) and the like can be obtained. Thereafter, the base station can provide the terminal (s) with the minimum information for operation in the system. Here, the minimum information may be referred to as minimum system information (Min-SI), and may include system information (eg, MIB, SIB, etc. of the existing LTE system) required for operation of the terminal. Can be. Hereinafter, for the convenience of description, the minimum information is referred to as 'Min-SI'.

At this time, all of the Min-SI may be set to be transmitted through the NR-PBCH. However, when it is determined that the total amount of information of the Min-SI is large enough to be transmitted through the NR-PBCH, a part of the Min-SI is transmitted through the NR-PBCH, and the remaining Min-SI (for example, Remaining Minimum System Information (RMI) ) May be set to be transmitted via another method.

In this case, the remaining Min-SI is configured to be transmitted through PDSCH (i.e., NR-PDSCH) similarly to the existing LTE system, or a channel (eg, secondary PBCH (s-PBCH) configured to transmit the remaining Min-SI). It may be set to be transmitted through)). However, in the case of the NR system, assuming that the UE does not consider CSS that can be seen by all terminals, a method of transmitting the remaining Min-SI through the s-PBCH may be relatively preferable.

Hereinafter, a description will be given of a method of scheduling the s-PBCH without DCI and a method of scheduling using DCI.

In this case, it is assumed that the embodiments (and / or methods) described herein use s-PBCH to transmit the remaining Min-SI, but the present invention is not limited thereto, and even when NR-PDSCH is used. Of course, the same can be applied. In addition, for convenience of description, a channel configured to transmit the remaining Min-SI is referred to as s-PBCH, but is not limited thereto. In other words, the s-PBCH herein may be replaced with another named channel (s) set to transmit the remaining Min-SI.

In addition, hereinafter, the embodiments described herein are merely divided for convenience of description, and some components or features of one embodiment may be included in another embodiment, or may be replaced with corresponding components or features of another embodiment. Can be. For example, the method described in the following third embodiment may be applied to the method described in other embodiments, and vice versa.

제1 실시 예 - DCI 스케줄링을 이용하지 않는 s-PBCH 전송First embodiment-s-PBCH transmission without DCI scheduling

First, in transmitting the s-PBCH, a method that does not use a scheduling scheme through DCI may be considered. Specifically, s-PBCH scheduling information (ie, scheduling information for s-PBCH transmission) is provided by a part of Min-SI transmitted through NR-PBCH (for example, PBCH and primary PBCH) instead of a separate DCI. The method can be considered.

In one example, the s-PBCH scheduling information may be organized as follows.

s-PBCH timing information (e.g., frame number, subframe number, slot number, period, etc.) First, in transmitting s-PBCH, there is a method that does not use a scheduling method through DCI. Can be considered.

s-PBCH frequency information (eg, subband, resource block, RB, subcarrier spacing index, SCS index, etc.)

Repetition number

Transmission Block Size (TBS) and / or Modulation and Coding Scheme (MCS)

Hereinafter, methods for providing s-PBCH scheduling information through NR-PBCH will be described in detail.

First, considering the field constituting the predetermined portion of Min-SI, it may be undesirable to provide all of the s-PBCH scheduling information through the predetermined portion of Min-SI. Therefore, a method of providing s-PBCH scheduling information through combining with other parameters may be considered. In this case, at least a time and / or frequency resource location and some scheduling information when the s-PBBCH is transmitted may be included in the NR-PBCH and transmitted. In addition, by transmitting information on a beam operation mode to the NR-PBCH, the base station may inform whether beam sweeping is currently being performed or transmit a beam index. .

In addition, some of the s-PBCH scheduling information provided through Min-SI may be considered to be provided using a cyclic redundancy check mask (CRC) mask for the NR-PBCH. For example, the UE may be configured to obtain information on time and / or frequency resource, TBS, etc. for s-PBCH scheduling through a CRC mask. At this time, the transmission opportunity of the s-PBCH may be set long enough so that the CRC mask does not change within a period in which Min-SI is encoded.

In this case, since the UE additionally checks only the CRC mask, the number of blind decoding (BD) does not increase. In addition, there is an advantage of reducing the field for s-PBCH scheduling among Min-SI.

In addition, it provides a part of the above-described information (that is, an example of the aforementioned s-PBCH scheduling information) in a part of Min-SI transmitted through the NR-PBCH, and provides a value of the information and a cell identifier (Cell ID, A method of providing time and / or frequency information of the s-PBCH may be considered based on the CID) value.

For example, it may be assumed that information on the TBS and the number of repetitions is provided through a part of Min-SI transmitted through the NR-PBCH. In this case, the timing scheduling information may be provided based on the number of repetitions and the cell identifier, and the frequency scheduling information may be set to be provided based on the TBS and the cell identifier. Here, the timing scheduling information may mean information for scheduling the time domain of the s-PBCH, and the frequency scheduling information may mean information for scheduling the frequency domain of the s-PBCH.

In the case of using the method, interference between neighboring cells can be reduced by bringing different scheduling positions between neighboring cells.

In addition, it provides a part of the above-described information (i.e., an example of the aforementioned s-PBCH scheduling information) in a portion of Min-SI transmitted over the NR-PBCH, and the value of the information, the cell identifier value, and ( A method of providing time and / or frequency information of the s-PBCH may also be considered based on the subband (for example, frequency raster location) information on which the synchronization signal is detected.

For example, it may be assumed that information on the TBS and the number of repetitions is provided through a part of Min-SI transmitted through the NR-PBCH. In this case, the timing scheduling information may be provided based on the number of repetitions and the cell identifier, and the frequency scheduling information may be set based on the TBS, the cell identifier, and the subband location.

Even when the method is used, interference between neighboring cells can be reduced by bringing different scheduling positions between neighboring cells. In addition, when using the method, since the frequency scheduling information of the s-PBCH may vary according to a synchronization signal transmitted through different subbands in the same base station, a candidate for scheduling the s-PBCH may be a candidate. ) Can be increased.

Next, the location where the s-PBCH is scheduled through the above-described method (s) will be described in detail.

First, a method of configuring s-PBCH to be transmitted in specific subframe (s) (or slot (s)) set by the above-described method (s) may be considered. Here, the set specific subframe (s) may be set to exist at a predetermined time and frequency position separately from a synchronization signal block (SS block).

At this time, in the case of the 6 GHz or less band (Below 6 GHz), the base station, through the omni-beam (ie, one beam), a fixed number (eg, 1) within a specific preset subframe It can be set to transmit the s-PBCH using the) OFDM symbols. In contrast, in the case of the 6 GHz band or more (Above 6 GHz), the base station performs beam sweeping (eg, analog beam sweeping) over a specific preset subframe (s) to transmit the s-PBCH. Can be set.

In this case, transmission of a signal (ie, paging signal) related to a paging procedure may be set to be associated with an s-PBCH transmission procedure. For example, a control signal carrying (ie, containing) a DCI scheduling a paging signal may be configured to be transmitted by frequency division multiplexing (FDM) with the NR-PBCH in the SS block. In addition, the payload (ie, data) of the paging signal may be set to be transmitted by FDM and s-PBCH which is preset and transmitted. At this time, the DCI scheduling the paging signal may be set to be FDM with the NR-PSS and / or NR-SSS in the SS block. An example of the method may be as shown in FIG. 6.

6 shows an example of an s-PBCH and a paging transmission method to which the method proposed in the present specification can be applied. 6 is merely for convenience of description and does not limit the scope of the present invention.

Referring to FIG. 6, an area 605 represents an area in which an NR-PSS is transmitted (that is, allocated), an area 610 represents an area in which an NR-SSS is transmitted, and an area 615 represents an area in which an NR-PBCH is transmitted. The region 620 represents an area where the s-PBCH is transmitted, and the region 625 represents an area where a control signal carrying (i.e., delivering) a DCI scheduling a paging signal is transmitted, and the region 630 represents a payload of the paging signal ( That is, the data for paging) is transmitted.

As shown in FIG. 6, the SS block may be composed of NR-PSS, NR-SSS, and / or NR-PBCH. For example, NR-PSS, NR-SSS, and NR-PBCH may form an SS block and be beam sweeped and transmitted. In this case, information on s-PBCH scheduling may be provided using a combination of the above-mentioned parameters and Min-SI of a portion transmitted through the NR-PBCH. Accordingly, at the time and / or frequency resource set, the s-PBCH may be set to be beam-swept and transmitted.

In this case, the order in which the s-PBCH is beam sweeped may be set in the same order as the order in which the NR-PBCH (or SS block) is beam sweeped. Specifically, as shown in FIG. 6, the NR-PBCH transmitted second from behind (ie, last to second of the beam sweeping order) may be configured to schedule the s-PBCH transmitted second from behind.

In addition, the control information for the paging signal may be set to be beam-swept and transmitted in the form of NR-PBCH and FDM of the SS block. In this case, the payload for the paging signal may be set to be beam-swept and transmitted in the form of s-PBCH and FDM. For example, as shown in FIG. 6, the area 625 may be allocated to be FDM with the area 615, and the area 630 may be allocated to be FDM with the area 620.

In addition, unlike the above-described method, a method of configuring the s-PBCH to be transmitted by FDM with the SS block may also be considered. At this time, similar to the methods described above, a time and / or frequency resource for transmitting the s-PBCH may be set.

For example, the s-PBCH may be delivered through a resource region established using a portion of Min-SI and a combination of a plurality of parameters delivered through the NR-PBCH. Alternatively, since the s-PBCH is set to be transmitted by FDM with the SS block, the base station may be configured not to provide the terminal with information about the frequency resource on which the s-PBCH is transmitted.

In addition, in the case of a band below 6 GHz (that is, below 6 GHz), the base station transmits a single SS block, and the s-PBCH may be configured to be transmitted by FDM with the corresponding SS block. In contrast, in the case of the 6 GHz band or more (that is, Above 6 GHz), the base station transmits a plurality of SS blocks by beam sweeping according to a predetermined SS block period (ie, SS block transmission period), and s-PBCH FDM and the corresponding SS blocks may be configured to be transmitted in a beam swept form.

At this time, the transmission period of the NR-PBCH and the transmission period of the s-PBCH may not match. In other words, when NR-PBCH is transmitted, s-PBCH may or may not be transmitted through the beam.

For example, the SS block type is an SS block type composed of NR-PSS, NR-SSS, and NR-PBCH, and an SS block type composed of NR-PSS, NR-SSS, and s-PBCH. Can be classified as two. In this case, the period of the SS block type 1 may be set to 40 ms, and the SS block type 2 may be set to be transmitted in a period of 5 ms where the SS block type 1 is not transmitted. In this case, between the SS block type 1 is transmitted and the next (i.e., subsequent) SS block type 1 is transmitted, the SS block type 2 may be set to be transmitted seven times.

Since the s-PBCH may be set to be transmitted at different points in time through a plurality of blocks while varying the content (i.e., contents) to be delivered, the s-PBCH may be self-decryptable at each point in time when the s-PBCH is transmitted. self-decodable). In this case, a signaling procedure (ie, s-PBCH block index signaling) for the index of the s-PBCH block may be additionally required.

In addition, like the above-described method, even in the case of the method, the transmission of a signal related to a paging procedure may be set to be associated with the s-PBCH transmission procedure. For example, a control signal carrying (ie, containing) a DCI scheduling a paging signal may be configured to be transmitted by frequency division multiplexing (FDM) with the NR-PBCH in the SS block. In addition, the payload (ie, data) of the paging signal may be set to be transmitted using a resource which is preset and transmitted. At this time, the DCI scheduling the paging signal may be set to be FDM with the NR-PSS and / or NR-SSS in the SS block. An example of the method may be as shown in FIG. 7.

7 shows another example of an s-PBCH and a paging transmission method to which the method proposed in the present specification can be applied. 7 is merely for convenience of description and does not limit the scope of the invention.

Referring to FIG. 7, an area 705 represents an area in which NR-PSS is transmitted (that is, allocated), an area 710 represents an area in which NR-SSS is transmitted, and an area 715 represents an area in which NR-PBCH is transmitted. , Area 720 indicates an area in which the s-PBCH is transmitted, area 725 indicates an area in which a control signal carrying (i.e., transmitting) DCI scheduling a paging signal is transmitted, and area 730 represents a payload of the paging signal ( That is, the data for paging) is transmitted.

As shown in FIG. 7, the SS block may be composed of NR-PSS, NR-SSS, and / or NR-PBCH. For example, NR-PSS, NR-SSS, and NR-PBCH may form an SS block and be beam sweeped and transmitted. In this case, information on s-PBCH scheduling may be provided using a combination of the above-mentioned parameters and Min-SI of a portion transmitted through the NR-PBCH. Here, the information about the s-PBCH scheduling may be transmitted by FDM with the SS block. Accordingly, the s-PBCH may be configured to be transmitted by beam sweeping.

In addition, the control information for the paging signal may be set to be beam-swept and transmitted in the form of NR-PBCH and FDM of the SS block. In this case, the payload for the paging signal may be set to be beam-swept and transmitted at the set time and / or frequency resource. For example, as shown in FIG. 6, the region 725 may be FDM with the region 615, and the region 730 may be allocated in consideration of beam sweeping in a preset resource region. For example, the beam sweeping order set for the region 730 may be set to be the same as the beam sweeping order set for the region 725.

At this time, the information on the transmission period of the s-PBCH may be set to be transmitted through the NR-PBCH. In this case, the terminal may be configured to check the corresponding information and decode the s-PBCH at a timing transmitted to the s-PBCH.

In addition, in one embodiment of the present invention, instead of the above-described method (i.e., the method of setting the transmission period of the s-PBCH), the s-PBCH scheduled through the NR-PBCH is the next SS burst (SS burst). It can be set to be transmitted in the SS block using the same beam (beam) belonging to. In this case, there is an advantage in that the burden of having to put the s-PBCH up to the s-PBCH together with the SS block can be reduced.

Here, SS burst may refer to a set (or group) of SS block (s). In this case, the SS block may be divided into various types, as mentioned above. For example, the SS block may consist of a sync signal (ie, PSS, SSS) and NR-PBCH, or may consist of a sync signal and s-PBCH, or may consist of a sync signal, NR-PBCH, and s-PBCH. have. That is, the SS block may consist of a synchronization signal and one or more signals (or channels).

In other words, NR-PBCH may be transmitted on the SS block in the first SS burst, and s-PBCH scheduled on the NR-PBCH may be transmitted on the SS block in the second SS burst. In this case, the direction of the beam used for the transmission of the s-PBCH may be set to be the same as the direction of the beam used for the transmission of the NR-PBCH. In this case, the beam index order of beam sweeping applied to the transmission of the s-PBCH may be set to be the same as the beam index order of beam sweeping applied to the transmission of the NR-PBCH.

Generalizing this, a beam used for transmission of a channel for scheduling a specific channel and a beam used for transmission of the specific channel may be set identically.

If the beam used for the scheduling channel and the beam used for the scheduled channel are not set identically, the terminal performs the beam sweeping operation to receive the scheduling channel, and also the beam sweeping operation to receive the scheduled channel. You need to do

In this case, when using the method proposed in the present specification, the terminal does not need to perform a beam sweeping operation to receive a scheduled channel. In this case, the UE may receive the specific channel by performing channel decoding only on a (preset) resource region corresponding to the beam used for the scheduling channel. As a result, by setting the same beam in the scheduling channel and the channel to be scheduled, there is an advantage that the complexity of the terminal can be lowered.

8 illustrates an example of an operation flowchart of a terminal receiving system information in a wireless communication system to which the method proposed in this specification can be applied. 8 is merely for convenience of description and does not limit the scope of the present invention.

Referring to FIG. 8, it is assumed that the terminal receives system information through one or more channels (or signals) as described above.

In operation S805, the terminal may receive first system information through a first physical channel. For example, the terminal may receive a predetermined portion of Min-SI through the first PBCH (eg, NR-PBCH) as described above.

Thereafter, in step S810, the terminal may receive second system information through the second physical channel. For example, the terminal may receive the remaining Min-SI through the second PBCH (eg, s-PBCH) as described above.

In this case, the second system information may be system information other than the first system information among the system information for the terminal (that is, the Min-SI described above). That is, as mentioned above, the first system information may include a portion of Min-SI, and the second system information may include the remaining Min-SI.

In addition, the second physical channel may be scheduled through the first physical channel. For example, time and / or frequency resources over which the second physical channel is transmitted may be allocated through the first physical channel. In this case, the information indicating the time and / or frequency resource is carried directly through the first physical channel or through downlink control information (DCI) transmitted in a specific resource region indicated by the first physical channel. It may be carried (hereinafter described in detail in the second embodiment).

For example, the first physical channel may include information indicating a resource region to which downlink control information (DCI) for scheduling the second physical channel is transmitted. In this case, the terminal may receive the downlink control information, identify a specific resource region to which the second physical channel is allocated, and receive the second physical channel.

In addition, a beam set to receive the first physical channel may be set to be the same as a beam set to receive the second physical channel. In other words, the beam for receiving the second physical channel may be set to a beam used for reception of the first physical channel. That is, the terminal may be configured to use the beam used to receive the first physical channel to receive the second physical channel. In this case, the beam sweeping order (ie, beam index order) applied to the transmission of the first physical channel and the beam sweeping order applied to the transmission of the second physical channel may be set to be the same.

Also, in various embodiments of the present disclosure, the number of blocks (eg, SS blocks) on which the first physical channel (eg, NR-PBCH) is transmitted and the number on which the second physical channel is transmitted may be equally set. . That is, considering the case of transmitting through a plurality of beams, the number of transmission of the scheduling channel and the number of transmission of the scheduled channel may be set equal. By doing so, when the terminal receives the second physical channel without performing the beam sweeping (i.e., when the beam used for the reception of the first physical channel is used for the reception of the second physical channel), the probability of an error is reduced. It can be effective. This is because, if the number of transmissions of the first physical channel and the number of transmissions of the second physical channel are set to be the same, an area corresponding to each beam may be matched in a one-to-one relationship.

In this case, the first physical channel may be transmitted to be Tmie Division Multiplexing with a synchronization signal (eg, NR-PSS, NR-SSS). In this case, the synchronization signal and the first physical channel may be set to an SS block. In addition, the second physical channel may be transmitted in a specific resource region established through the first physical channel.

In this case, the resource region through which the sync signal block is transmitted may be FDM with the resource region through which paging control information for scheduling a paging signal is transmitted.

Alternatively, a resource region through which paging control information for scheduling a paging signal is transmitted may be FDM with the first physical channel, and a resource region through which the paging signal is transmitted may be FDM with the second physical channel.

In addition, in an embodiment of the present invention, a method of configuring the base station to transmit the s-PBCH using multiple symbols may also be considered. An example of the method is shown in FIG. 9.

9 shows another example of an s-PBCH and a paging transmission method to which the method proposed in the present specification can be applied. 9 is merely for convenience of description and does not limit the scope of the invention.

Referring to FIG. 9, an area 905 represents an area in which an NR-PSS is transmitted (ie, allocated), an area 910 represents an area in which an NR-SSS is transmitted, and an area 915 represents an area in which an NR-PBCH is transmitted. , Region 920 represents an area where the s-PBCH is transmitted, region 925 represents an area where a control signal carrying (i.e., transmitting) DCI scheduling a paging signal is transmitted, and region 930 represents a payload of the paging signal ( That is, the data for paging) is transmitted.

Here, s-PBCH may be FDM with NR-PSS and NR-SSS. That is, as shown in FIG. 9, the region 920 may be multiplexed with the

regions

905 and 910 by the FDM scheme. In this case, the s-PBCH may be configured to be transmitted using a plurality of symbols set over a sufficiently wide bandwidth.

In this case, the terminal may be configured to perform a measurement by using a reference signal (RS) transmitted through the corresponding s-PBCH.

In addition, in FIG. 9, all of the regions of the s-PBCH are expressed in the same manner, but basically, the size of the region in which the s-PBCH is transmitted may be flexibly scheduled. For example, the size of the region in which the s-PBCH is transmitted may be set differently for each SS block.

In addition, as shown in FIG. 9, an empty space may be set between NR-PSS and NR-SSS and s-PBCH. Here, the empty space may be set to a bandwidth margin for performing filtering in a procedure in a time domain in which the terminal proceeds to obtain synchronization. In this case, an area of N percent (N%) (eg, N = 10) of the bandwidth set for performing filtering may be set as a margin. The margin may be located on both sides of the NR-PSS and / or NR-SSS, in which case the margin may be set by dividing by N / 2 percent (N / 2%) of the bandwidth set for performing the filtering.

In addition, unlike the above-described scheme (eg, FIG. 9), a method of configuring s-PBCH to be transmitted by TDM with NR-PSS, NR-SSS, and / or NR-PBCH may be considered. An example of the method is shown in FIG. 10.

10 shows another example of an s-PBCH and a paging transmission method to which the method proposed in the present specification can be applied. 10 is merely for convenience of description and does not limit the scope of the invention.

Referring to FIG. 10, an area 1005 represents an area in which NR-PSS is transmitted (that is, allocated), an area 1010 represents an area in which NR-SSS is transmitted, and an area 1015 represents an area in which NR-PBCH is transmitted. , Region 1020 represents a region in which the s-PBCH is transmitted, region 1025 represents a region in which a control signal carrying (ie, delivering) a DCI scheduling a paging signal is transmitted, and region 1030 represents a payload of the paging signal ( That is, the data for paging) is transmitted.

For example, as shown in FIG. 10, the s-PBCH may be TDM and transmitted with the NR-PSS, NR-SSS, and / or NR-PBCH. At this time, the SS block may be set to NR-PSS, NR-SSS, NR-PBCH, and s-PBCH.

Using this method, the length of the SS block and the time required for beam sweeping can be long. However, when the s-PBCH is transmitted within a bandwidth equal to or less than the bandwidth used for the NR-PBCH, the terminal that can only see the bandwidth size re-tuning the frequency to receive the s-PBCH. There is no need to move. That is, through the method, overhead in terms of selecting a frequency domain for the terminal to receive system information can be reduced.

제2 실시 예 - DCI 스케줄링을 이용하는 s-PBCH 전송Second Embodiment-s-PBCH Transmission Using DCI Scheduling

Next, a method of using a scheduling scheme through DCI in transmitting s-PBCH will be described. That is, the scheduling information of the s-PBCH may be set to be transmitted through the DCI.

At this time, a method of setting a search space in which the DCI scheduling the s-PBCH can be transmitted needs to be considered. Information of the search region (ie, information indicating the search region) may be set to be provided through the NR-PBCH. Alternatively, the information of the search region may be set to be transmitted in a resource region inferred by a combination of a cell identifier (Cell ID) and a transmission position of NR-PSS, NR-SSS, and / or NR-PBCH. Alternatively, the resource region to which the information of the search region is transmitted may be indicated (or set) by a preset rule.

Hereinafter, methods for using a DCI-based scheduling scheme for s-PBCH transmission will be described in detail.

First, a method of configuring a search region to which a DCI scheduling s-PBCH can be transmitted may be multiplexed with the SS block may be considered. An example of the method is shown in FIG. 11.

11 shows another example of an s-PBCH and a paging transmission method to which the method proposed in the present specification can be applied. 11 is merely for convenience of description and does not limit the scope of the present invention.

Referring to FIG. 11, an area 1105 represents an area in which an NR-PSS is transmitted (ie, allocated), an area 1110 represents an area in which an NR-SSS is transmitted, and an area 1115 represents an area in which an NR-PBCH is transmitted. . In addition, the area 1120 represents an area in which a DCI for scheduling an s-PBCH is carried, and the area 1125 represents an area in which an s-PBCH is transmitted. In addition, the region 1130 indicates an region in which a control signal carrying (ie, delivering) a DCI for scheduling a paging signal is transmitted, and the region 1135 represents an region in which a payload (ie, data for paging) of a paging signal is transmitted. Indicates.

As shown in FIG. 11, an area in which DCI is transmitted (that is, area 1120) for scheduling an s-PBCH, that is, for allocating an area in which the s-PBCH is transmitted, may be FDM with the SS block. Here, the SS block may be composed of NR-PSS, NR-SSS, and / or NR-PBCH, and may include a region (ie, region 1120 or 1130) for scheduling an s-PBCH or paging signal. .

In this case, the DCI that can be transmitted to the corresponding search area (that is, the area 1120) may be set to be transmitted using the same beam as the corresponding SS block.

For example, the terminal performs synchronization through NR-PSS, NR-SSS, and / or NR-PBCH, identifies a cell ID (Cell ID), and a part of Min-SI transmitted through NR-PBCH. Can be received. Subsequently, the UE schedules the s-PBCH through a discovery region that is multiplexed (eg, FDM or TDM) and transmitted with an SS block having the same beam direction in a subsequent (ie, subsequent) SS burst. Blind decoding (BD) on DCI may be performed. Accordingly, the terminal may identify (or obtain) scheduling information of the s-PBCH and may decode the s-PBCH.

In this method, since the scheduling information of the s-PBCH need not be additionally transmitted through the NR-PBCH, it is possible to reduce the load of a certain portion of Min-SI transmitted through the NR-PBCH. have. That is, since the scheduling information of the s-PBCH is not directly transmitted through the NR-PBCH, the amount of information transmitted through the NR-PBCH may be reduced, thereby reducing the overhead associated with NR-PBCH transmission. have.

In addition, although FIG. 11 distinguishes an area for scheduling a paging signal (ie, region 1130) and an area for scheduling an s-PBCH (ie, region 1120), this is for convenience of description and only for paging in one region. A scheme of scheduling the signal and the s-PBCH may also be considered. For example, the DCI scheduling the paging signal may be shared so that the DCI scheduling the s-PBCH may be transmitted by sharing a search area in which the DCI scheduling the paging signal may be transmitted.

Alternatively, a search region in which a DCI scheduling the s-PBCH may be transmitted and a method of configuring the s-PBCH to be multiplexed with the SS block (for example, FDM or TDM) may be considered. An example of the method is shown in FIG. 12.

12 shows another example of an s-PBCH and a paging transmission method to which the method proposed in this specification can be applied. 12 is merely for convenience of description and does not limit the scope of the invention.

Referring to FIG. 12, an area 1205 represents an area in which an NR-PSS is transmitted (ie, allocated), an area 1210 represents an area in which an NR-SSS is transmitted, and an area 1215 represents an area in which an NR-PBCH is transmitted. . In addition, the area 1220 indicates an area where a DCI for scheduling an s-PBCH is carried, and the area 1225 indicates an area where an s-PBCH is transmitted. In addition, the area 1230 indicates an area in which a control signal carrying (i.e., transmitting) a DCI for scheduling a paging signal is transmitted, and the area 1235 indicates an area in which a payload (ie, data for paging) of a paging signal is transmitted. Indicates.

As shown in FIG. 12, a region in which DCI is transmitted (ie, region 1220) and s-PBCH (ie, region 1225) for scheduling s-PBCH, that is, for allocating a region in which s-PBCH is transmitted, is SS. Can be multiplexed with blocks. Here, the SS block may be composed of NR-PSS, NR-SSS, and / or NR-PBCH, and may include a region (ie, region 1220 or 1230) for scheduling an s-PBCH or paging signal. .

In addition, in the case of FIG. 12, the area 1220 and the area 1225 are assumed to be FDM and the SS block. However, this is only for convenience of description and may be multiplexed through the TDM scheme.

In this case, the DCI that can be transmitted to the corresponding search area (that is, the area 1220) may be set to be transmitted using the same beam as the corresponding SS block.

In this case, since the s-PBCH is also multiplexed and transmitted with the SS block, the amount of information for scheduling the s-PBCH may be reduced. In addition, there is an advantage that can change the resource allocation value of the s-PBCH delivered through the DCI. In addition, even when using the method, the base station does not need to directly transmit the scheduling information of the s-PBCH through the NR-PBCH. Therefore, the amount of information transmitted through the NR-PBCH can be reduced, thereby reducing the overhead associated with NR-PBCH transmission.

In addition, in the above-described first and second embodiments, it is assumed that NR-PSS, NR-SSS, and NR-PBCH (and / or s-PBCH) are multiplexed by the TDM scheme to configure the SS block. . However, this is merely for convenience of description, and through hybrid division multiplexing method in which NR-PSS, NR-SSS, and NR-PBCH (and / or s-PBCH) consider TDM and FDM together. Even in the case of multiplexing, the above-described method (s) can be equally applied.

In addition, in the above-described methods, the bandwidth over which the NR-PSS and the NR-SSS are transmitted is represented relatively smaller than the bandwidth over which the NR-PBCH is transmitted. This is only an example expressed in consideration of an increase in detection complexity as a bandwidth for transmitting synchronization signals increases when a UE performs processing on a time domain using NR-PSS and NR-SSS to acquire synchronization. It is not limited to this.

Further, in the region in which a control signal (or channel) carrying (i.e. carrying) a DCI for scheduling a paging signal shown in the examples of the above-described methods (e.g., Figures 6-12) is transmitted, instead of the corresponding DCI In addition, a paging indicator of UE dedicated or UE group dedicated may be set to be delivered.

Here, the paging indicator may be set to a sequence dedicated to the terminal or terminal group only. In this case, the terminal may be configured to receive a paging signal by identifying a resource region to which the paging payload is transmitted when its paging indicator is detected in the corresponding region.

Additionally, after the terminal detects its paging indicator and receives the paging payload, a method of configuring the base station to select the serving beam of the terminal by performing a random access procedure (RACH process) may also be considered. have. At this time, the information on the resource for the random access procedure may be delivered through the NR-PBCH or paging payload. In addition, the location where the paging indicator is transmitted may be preset (or promised) or may be indicated through Min-SI.

In the case of using the above method, there is an advantage in that resources used can be reduced as compared with a case in which a region in which a DCI for scheduling a paging signal (ie, a paging DCI) is transmitted is differently designated for each terminal or terminal group.

In addition, in the above-described first and second embodiments, the bandwidth over which the NR-PBCH can be transmitted may be set to a smaller value among the minimum bandwidth of the system and the minimum bandwidth of the UE. Here, the minimum bandwidth of the terminal may mean the smallest bandwidth regardless of the UE category.

For example, when the minimum bandwidth of the system is 5 MHz and the minimum bandwidth of the terminal is 3 MHz, the bandwidth over which the NR-PBCH can be transmitted may be set to 3 MHz. In addition, the bandwidth over which the s-PBCH is transmitted may be set smaller than or equal to the bandwidth over which the above-described NR-PBCH may be transmitted. However, when the s-PBCH is transmitted with a wider bandwidth, since the UE can perform decoding by dividing the bandwidth to which the NR-PBCH can be transmitted, the s-PBCH is transmitted so that each can be self-decoded. It may be set to.

Similarly to the system information, the above-described methods may be similarly applied even when the terminal receives control information. For example, in an NR system, a control channel (eg, PDCCH or NR) is transmitted through a common control signal (or a common signal) transmitted from a common control region. A region in which the -PDCCH) is transmitted (that is, a control channel region) may be set. That is, the control channel region may be scheduled through a signal (or channel) transmitted in the common control region.

Here, the common control signal is a signal for transmitting common control information for one or more terminals, and includes a signal for transmitting information for scheduling a control channel region for each terminal (eg, information about a control channel region). Downlink control information (DCI))). In this case, the control channel region may be set differently for each terminal.

In this case, the terminal, in order to receive the control information from the base station, identifies the control channel region through a common control signal (for example, the first control information) transmitted in the common control region, and to each terminal in the identified control channel region Control information (eg, second control information) set for the terminal may be received. For example, the common control region corresponds to the region in which the NR-PBCH mentioned in the above-described first and second embodiments is transmitted, and the region in which the control channel is transmitted is the above-described first and second embodiments. It may correspond to the region in which the s-PBCH mentioned in the above is transmitted.

In view of the foregoing, a terminal operating in an NR system may transmit a common control signal transmitted from a common control region in order to identify a control channel region allocated thereto (i.e., to receive control information set for itself). It can be set to use.

For reference, in the NR system, a method of transmitting a synchronization signal using an analog beamforming method may be considered. In this case, the base station may set the beam direction differently for each symbol at the time of transmitting the sync signal (for example, a sync subframe). In this case, the terminal may acquire synchronization with respect to time and / or frequency based on the synchronization signal transmitted in the beam direction most suitable to the terminal (eg, having the highest beam gain).

In addition, the NR system supports usage scenarios (ie, services) with different service requirements. For example, the NR system supports services such as Enhanced Mobile Broadband (eMBB), Ultra-Reliable and Low Latency Communication (URLLC), and Massive Machine Type Communication (mMTC).

However, key performance indicators (KPIs) required by each of the services are different, and accordingly, subcarrier spacing, subframe length, CP length, etc. for each service are different. The numerology needs to be set differently. In addition, as described above, as one NR system supports a plurality of services configured with different numerologies, there may be a case where different numerologies are multiplexed.

In addition, although channel estimation is performed using a common RS such as a cell-specific reference signal (CRS) in an existing LTE system (ie, a legacy LTE system), in an NR system, a UE-specific DMRS ( Channel measurement may be performed using a UE-specific demodulation RS).

In addition, in a conventional LTE system, a common control signal is transmitted through a common search space (CSS) allocated to a control channel transmitted over a whole band. In contrast, in the NR system, the system is designed in a direction in which no control channel is transmitted over the entire band. As described above, the control channel region (that is, the region in which the control channel is transmitted) is set differently for each terminal. Can be.

Therefore, a signal having a specific purpose for all terminals or a specific group of terminals needs to be transmitted in the form of a common control signal. In other words, the control signals for all terminals or a specific group of terminals need to be transmitted in a common control region set separately in the form of a common control signal.

In this regard, in the present specification, in the process of transmitting control information in the NR system, resource setting and related basic operations necessary for transmitting a common control signal are proposed. Here, the related basic operation may mean a terminal operation when the terminal does not receive a common control signal, which may be referred to as a fall back operation.

Hereinafter, resource setting and related basic operations of the common control signal will be divided into 6 GHz or less bands (ie, below 6 GHz) and 6 GHz or more bands (ie, above 6 GHz).

제3 실시 예 - 6 GHz 이하 대역에서의 공통 제어 신호Third embodiment-common control signal in band below 6 GHz

First, examples of transmission of a common control signal in a 6 GHz or lower band (Below 6 GHz) of an NR system include transmission of blank resource information and uplink / downlink slot type information (UL / DL slot type). information) may be considered.

First, a case in which transmission of blank resource information is considered will be described. Here, the blank resource information may refer to information indicating a resource that is not used (or not used) for the corresponding terminal.

Given the case where multiple systems or multiple services coexist in an NR system, a situation may arise where the same time and / or frequency resource must be shared. In this case, in order to avoid interference with other systems or other services, there may be terminal (s) requiring blank resource information.

For example, in a situation where the NR system and the LTE system coexist (for example, when a resource not used by the LTE system is used in the NR system), a terminal (ie, UE-NR) and an LTE system for the NR system are used. There may be a UE (UE-LTE) for. In this case, when the UE-NR and the UE-LTE are allocated the same time and / or frequency resource, the first three OFDM symbols may be set as blank resource information in order to avoid interfering with the UE-LTE in terms of UE-NR. have. Through this, interference affecting the control channel of the LTE system can be reduced.

For another example, a situation in which a URLLC service and an eMBB service coexist may be considered. That is, the UE (eg, UE_URLLC) for the URLLC service and the UE-eMBB for the eMBB service may exist together. In this case, when the UE-URLLC and the UE-eMBB have been allocated the same time and / or frequency resource, the base station may inform the UE-eMBB blank resource information in order to prevent the eMBB service from interfering with the URLLC service. . Or, in the opposite case, the base station may inform the UE-URLLC of the blank resource information in order to prevent the URLLC service from interfering with the eMBB service.

In this case, the terminal receiving the blank resource information may be set according to the priority between the systems or the priority between the services.

Next, a case in which transmission of UL / DL slot type information is considered will be described. In the NR system, UL / DL slot type information needs to be transmitted to all terminals in order to dynamically configure DL / UL symbols for each subframe (or slot).

For example, the current subframe is set to a DL centric subframe, but may be set such that a UL center subframe or a UL / DL coexistence subframe is transmitted in a subsequent (ie, next) subframe. In this case, as the base station transmits UL / DL slot type information of the subframe following the specific time and / or frequency domain of the subframe to the UE, flexible and efficient UL / DL resource configuration may be performed in terms of system. .

Hereinafter, a method of setting resources for the common control signal in the 6 GHz or less band will be described in detail.

Resources to which the common control signal can be transmitted in the 6 GHz or less band of the NR system may be set similarly to the method used in the existing LTE system. As an example, it may be assumed that a common search area (CSS) is set up in a predetermined time and / or frequency domain (eg, defined in a standard). In this case, all terminals or a specific terminal group may be configured to monitor the corresponding CSS to receive a common control signal through the DCI.

In this regard, specific methods for configuring a resource for a common control signal in consideration of a terminal group are as follows.

First, a method of grouping UEs using an RNTI value (hereinafter, Method 1) may be considered. In more detail, the UEs share a DCI format and may be grouped according to an RNTI value that scrambles the DCI format. In other words, terminals sharing one (ie, identical) DCI format may be grouped according to an RNTI value configured to scramble the DCI format. For example, for the UE group_A monitoring the DCI using RNTI_A and the UE group_B monitoring the DCI using RNTI_B, the type (or type) of common control information transmitted by the base station is Can be set differently.

In the case of using the method 1, since the base station can designate RNTI information semi-statically to each terminal using higher layer signaling (eg, RRC signaling), there is an advantage in terms of system operation of the base station. In addition, such grouping may be performed for each use case, for each beam, or for each numerology. For example, the terminal (s) using the first beam may be set to the UE group_1 and the terminal (s) using the second beam may be set to the UE group_2. At this time, of course, one terminal may belong to several groups.

Next, a method of grouping UEs using DCI (hereinafter, Method 2) may also be considered. In more detail, the terminals share one RNTI value and may be grouped according to a DCI format size value. In other words, terminals sharing one RNTI value may be grouped into different groups according to the DCI format size. For example, when the DCI format A and the DCI format B have different lengths, they may be configured to use different DCI formats for each UE group.

When using the method 2, the type of DCI format may be required as many as the number of terminal groups. However, since the terminals share the RNTI value, the base station does not need to perform additional signaling for RNTI delivery. In this case, the configuration for the DCI format to be monitored by the UE may be preset (on a system) or may need to be preset through higher layer signaling. In this case, the DCI format may be preset (or designated) for each use case, beam, or numerology.

Next, a method of grouping UEs using a field of DCI (hereinafter, Method 3) may also be considered. Specifically, the terminals share the same DCI format as one RNTI value and may be grouped using a DCI field. In other words, terminals sharing the same DCI format as one RNTI value may be grouped into different groups according to the value indicated in the field of DCI. For example, a UE group indicator field may be added to the DCI field, and the type of common control information transmitted from the base station may be set differently for each UE group receiving a value indicated through the corresponding field.

When using the method 3, the terminal does not need to perform additional blind decoding (BD). In this case, when the base station wants to transmit other information through the common control signal, it may be necessary to design the signal in accordance with the largest common control signal. As examples of the field added to the above-described DCI (or information indicated in the field added to the DCI), a group ID, a use case identifier, group information, or the like may be considered. .

In addition, not only one common control signal is transmitted, but also a cell-common signal that can be commonly applied to terminals located in all cells and a terminal group common control signal (UE) that can be transmitted for each terminal. It may be transmitted by being divided into a (group common control signal). For example, information indicating the slot type may be transmitted as a common control signal, and information indicating mini-slot information and the like may be configured to be transmitted as the terminal specific common control signal.

Next, a method of grouping UEs using different search spaces (hereinafter, Method 4) may also be considered. Specifically, even though the terminals use the same RNTI value and the same DCI format, candidate discovery and / or resources of the discovery domain monitored by the terminals may be set differently for each terminal group.

For example, an area in which the common control signal for the eMBB terminal is transmitted and an area in which the common control signal for the URLLC terminal are transmitted may be set differently, and through this, the base station may transmit information about different common control signals. have. In addition, a section (ie, a resource) in which a common control signal is transmitted for another terminal group may be set as a reserved resource from the viewpoint of one terminal group.

In this case, of course, one terminal may support one or more use cases. In addition, the terminal may belong to a plurality of groups, and when belonging to a plurality of groups, the terminal may be required to receive a plurality of common control signals.

Hereinafter, the basic operation of the terminal related to the aforementioned common control signal in the 6 GHz or less band will be described. For example, the basic operation may mean a fall-back operation. In the present specification, a basic operation related to transmission of blank resource information (or reserved resource information) and a basic operation related to transmission of UL / DL slot type information will be described in detail.

Basic behaviors related to the transmission of blank / held resource information

First, a basic operation (ie, fall-back operation) of a base station and a terminal for transmission of blank / holding resource information will be described in four steps.

(Step 1)-Determine whether blank / hold resource information is required

The base station may preset (or determine) whether blank / hold resource information is required for each terminal (or terminal group). In detail, whether the blank / holding resource information is required may be set differently for each UE category (or UE service type). The base station may or may not provide blank / hold resource information to the terminal according to such a configuration.

For example, when the NR system and the LTE system coexist, the UE_NR may be set to require blank / hold resource information, but the UE-LTE may be set to not require blank / hold resource information. In the case of using the method, there is an advantage in that the terminal can be grouped most easily. For another example, when the URLLC service and the eMBB service coexist in the same band, the base station may be configured to inform the terminal receiving which service the blank / holding resource information is required.

Alternatively, by differently setting the RNTI value for whether blank / holding resource information is required, a method for notifying the terminal by the base station may also be considered.

For example, assume that the actual blank / hold resource information is scrambled using a specific RNTI value. In this case, the base station informs the terminal group that needs to receive the corresponding information through the higher layer signaling (eg, RRC signaling), and informs the terminal group that does not need to receive the corresponding information. It can be set to not receive the DCI. In the case of using the method, it is possible to set terminals corresponding to different categories (or terminals receiving different services) to the same terminal group.

(Step 2)-Set default value of blank / hold resource information

A default value of blank / hold resource information needs to be set. Step 2 is to prepare for the case where the terminal does not receive such a signal when the above-described common control signal or the terminal group common control signal for the reserved resource is introduced into the NR system. In other words, when the terminal does not receive the common control signal to the base station, the terminal may be configured to operate according to a preset default value.

In this case, the default value of the blank / hold resource information may be set as in the following examples.

For example, the default value of the blank / hold resource information may be set to no blank resource. That is, when the terminal does not receive the common control signal, the terminal may perform the operation assuming that there is no blank resource (or a reserved resource). In this case, due to the operation of the terminal, interference may occur for the coexisting system (or service).

As another example, the default value of the blank / hold resource information may be set to empty the N-symbol (s). That is, when the terminal does not receive the common control signal, the terminal may perform the operation assuming a blank resource (or a reserved resource) as a predetermined N symbol. In this case, due to the operation of the terminal, interference may occur for the coexisting system (or service), and the ratio of available resources may vary according to the N value that is set. Such an N value may be set on the system or through signaling in a higher layer.

As another example, the default value of the blank / hold resource information may be set as a default reserved resource. When there is a default pending resource set in a higher layer (eg, higher layer signaling), a default configuration may be assumed when the terminal does not receive a common control signal. For example, the default configuration may be a pattern in which three OFDM symbols are assumed as a legacy PDCCH region and a CRS port is excluded to exclude CRS symbols.

When the blank / holding resource information is set as in the above-described examples, the blank / holding resource may be set in symbol units, but may be set in units of PRBs (or PRB groups) or in units of REs considering legacy LTE CRS. .

In addition, the base station may be configured to set a default operation mode semi-statically. Here, the default operation mode may mean an operation mode of the terminal according to the set default value (eg, the three examples described above).

For example, the base station may set the default operation to be free of blank / hold resources if necessary, and set the default operation to empty the N symbol (s) otherwise. Here, the default operation is an operation performed when the terminal does not receive the common control signal, and may refer to the above-described basic operation or fall-back operation.

(Step 3)-transmission of blank / hold resource information through a common control signal

The base station may transmit the blank / hold resource information to the terminal through the common control signal based on the above-described method and the default operation mode. In addition, the base station may be configured to change the preset default operating mode by sending additional information through a common control signal (or other RRC signaling).

For example, data transmitted through the common control signal may be a value (or information) for a pattern of reserved resources. In addition, when a period in which one common control signal is transmitted is set, the terminal assumes that the corresponding setting value is valid until the next period, and when the common control signal is not received, the default operation mentioned in step 2 (ie, Fallback operation). In contrast, if the period is not set, the terminal may assume that the value of one common control signal is valid until the next common control signal is received. At this time, the maximum value of the interval between the transmission of the two signals may be assumed by the terminal, and if the terminal does not receive the common control signal during the assumed maximum time, the default operation (ie, fall-back operation) to perform Can be.

(Step 4)-Attempt to receive common control signal

The terminal may attempt to receive the common control signal transmitted from the base station. If the terminal correctly receives the common control signal, the terminal may set the blank / hold resource in the allocated time and / or frequency domain by using the blank / hold resource information transmitted through the common control signal. In contrast, when the terminal does not receive the common control signal, the terminal may be set to perform an operation according to the method set to the default mode (that is, the fall-back operation described above).

In general, if the resource is not set to not be used semi-statically to solve the case in which the common control signal is not received (i.e., miss the common control signal), the terminal always assumes that there is no common control signal, the data is not It can be assumed to be mapped. When additional reserved resources are generated, the network (eg, base station) leaves the reserved resources empty through puncturing. Such additional reserved resources may be transmitted through a common control signal, and the terminal receiving such information may use decoding for the puncture of the corresponding resource.

If a common control signal is not introduced to the NR system, such information (ie, information on additional reserved resources) may be transmitted in a later retransmission procedure. That is, in consideration of the case where the common control signal is not received, the terminal may assume that the data mapping is punctured rather than rate matched to the reserved resource.

However, performing the above operation through the CSI-RS may affect measurement using the CSI-RS. Accordingly, the UE assumes that the CSI-RS is always transmitted in a non-reserved resource, or assumes that the CSI-RS is transmitted even if the resource is a reserved resource in a resource configured to transmit the CSI-RS. can do.

Also, in general, the common control signal may be assumed to be a signal for transmitting valid information even to terminals not scheduled (by the base station). In this case, the terminal may operate under the assumption that the common control signal is transmitted to most terminals existing in the coverage of the base station. In addition, when the common control signal is not received, the terminal may be set not to perform the configured operation.

When the above-described common control signal is transmitted and the terminal receives it, it can be assumed that the data to be transmitted by the terminal can resolve resources that are not available by puncturing the corresponding resource. In addition, it may be assumed that information for rate matching associated with data transmission and reception of the terminal may be transmitted in the scheduling of the terminal. In this case, if the terminal does not receive a common control signal (eg, DCI), the terminal may not receive data, and thus may transmit information on the assumption that it is always read.

For example, information on the UL / DL slot type may be transmitted through a common control signal. If it is assumed that the CSI-RS is not transmitted in the UL center slot, the terminal assumes that there is no CSI-RS, even if the CSI-RS is configured, but does not detect a common control signal, the CSI-RS in the slot The measurement may not be performed. In this case, the terminal may not skip (CSI-RS measurement report) (skip), or exclude from the accumulation (accumulation).

For another example, resource information for a reserved resource or a control channel may be transmitted through a common control signal. If the base station informs the area in which the control channel (eg, PDCCH) is transmitted through the common control signal, not receiving the corresponding signal (ie, the common control signal) may mean failure for the control channel. have. In order to prevent this, it may be assumed that the semi-static resources constitute information on at least some control resource sets or the entire set of possible control resources.

As another example, information about a mini slot pattern may be transmitted through a common control signal. Here, the mini-slot pattern may refer to a pattern in which mini-slots (eg, 2 symbols, 3 symbols, etc.) configured to be shorter than the slots are arranged in the resource region. If the base station informs the mini-slot pattern and the like through the common control signal, if the corresponding signal is not detected, the terminal may use the fall-back pattern. Here, the fallback pattern may refer to a default mini-slot pattern set for fallback operation.

In addition, the information transmitted in the common control signal may be classified into additional information and information that the terminal needs to receive for operation. In one example, the additional information may include information indicating additional reserved resources in addition to the semi-statically set reserved resources.

The signal for the additional information (ie, the common control signal) operates under the assumption that the terminal may not receive the signal, and may be set not to be affected by the operation even if the terminal does not receive the signal. For example, additional pending resources can avoid data transmission via puncturing. If dynamic TDD0 performs dynamic TDD0 and RRM-RS, CSI-RS, and tracking RSs can transmit / receive RSs periodically expected by the UE, this can be done. Signal (ie, common control signal) may be additionally set.

For example, the base station may inform (or transmit) information about a slot type through a common control signal. The UE may assume that slot type information is transmitted in a slot (or subframe) in which at least the corresponding RS is expected to be transmitted.

In this case, when the corresponding signal (ie, the common control signal) is not detected, the terminal may skip or drop the operation. In other words, in a resource corresponding to a periodically configured RS, the terminal may expect a signal (ie, a common control signal) indicating whether the corresponding resource is available.

In addition, whether or not to transmit such a signal (ie, a common control signal) may be set by the network. Or, if the dynamic TDD operation is set, it may be assumed that the common control signal is always transmitted.

Next, the basic operation (ie, fall-back operation) of the base station and the terminal for transmission of UL / DL slot type information will be described in three steps. In this case, information that may be used for every subframe (or slot), such as UL / DL slot type information, may be set to be known to all terminals.

(Step 1)-Set default value of UL / DL slot type information

A default value of UL / DL slot type information needs to be set. At this time, examples of default values that can be set are as follows.

For example, a default value of the UL / DL slot type information may be set to a DL centric slot. When the default operation mode of the UL / DL slot type is set to the DL center slot, it may be advantageous in the case of a UE having a lot of DL data to receive. However, if there is a lot of UL data to be transmitted, a delay may occur.

For another example, the default value of the UL / DL slot type information may be set to a UL centric slot. Setting the default operation mode of the UL / DL slot type to the DL center slot may be advantageous in the case of a UE having a lot of UL data to receive. However, if there is a lot of DL data to be transmitted, a delay may occur.

As another example, the default value of the UL / DL slot type information may be set to N DL symbol (s) and M UL symbol (s). Setting the default operation mode of the UL / DL slot type to a certain number of DL and UL symbol (s) may be advantageous for a terminal that needs to efficiently (or evenly) transmit and receive DL data and UL data. In this case, however, an additional signaling procedure indicating the specific number may be required.

(Step 2)-transmitting UL / DL slot type information through a common control signal

The base station may transmit the UL / DL slot type information to the terminal through a common control signal. In this case, the base station may operate in a manner similar to the step of transmitting the blank / holding resource information described above (ie, step 3 described above).

That is, the base station may be configured to transmit UL / DL slot type information through a common control signal based on the above-described method and the default operation mode. In addition, the base station may be configured to change the preset default operating mode by sending additional information through a common control signal (or other RRC signaling).

(Step 3)-Attempt to receive common control signal

The terminal may attempt to receive a common control signal transmitted from the base station. When the terminal correctly receives the common control signal, the terminal uses the UL / DL slot type information transmitted through the common control signal to determine the boundary between the DL region and the UL region in the corresponding slot (eg, a guard period). May be determined (and / or set) in advance. In this way, the terminal may preset the position of a symbol to transmit the UL data. In contrast, when the terminal does not receive the common control signal, the terminal may be set to perform an operation according to the method set to the default mode (that is, the fall-back operation described above).

제4 실시 예 - 6 GHz 이상 대역에서의 공통 제어 신호Fourth Embodiment-Common Control Signal in 6 GHz and Above Band

Also, as examples of transmission of common control signals in 6 GHz or higher band (Above 6 GHz) of the NR system, transmission of control region information, transmission of CSI-RS information, and Transmission of the UL / DL slot borrowing information may be considered.

First, a case in which transmission of control area information is considered will be described. Here, the control region information may mean information on the control region (that is, the region where the control channel is transmitted) set for each terminal mentioned above. Specifically, in the NR system, as in the conventional LTE system, since the area in which the control signal is transmitted is not set over the system bandwidth, the control area information may be set differently for each terminal.

Accordingly, the base station transmits a common control signal using a specific resource, and the terminal may be configured to monitor the corresponding area by receiving control area information for each terminal (or for each terminal group, for each beam, or for each neurology). have.

Next, a case in which transmission of CSI-RS information is considered will be described. Specifically, in the case of the NR system, information indicating whether the CSI-RS is transmitted in the current symbol may be set to be transmitted through a common control signal.

For example, in the 6 GHz and above band, which considers analog beamforming, unlike the 6 GHz and below band, the system (i.e., the base station) uses a common control signal for certain symbols being beam swept. Each symbol may indicate whether a CSI-RS is being transmitted. In other words, when beam sweeping is applied to one or more symbols, the base station may transmit information indicating whether CSI-RS transmission is performed in each symbol to the terminal. If the CSI-RS is transmitted, the UE may identify corresponding location information (ie, a location (or symbol) where the CSI0RS is transmitted) in advance through the information. Accordingly, the terminal may be configured to decode the symbol after performing rate matching (or puncturing).

In addition, transmission of UL / DL slot type information through a common control signal may be considered even in a band of 6 GHz or more. Since the related information is similar to the transmission of UL / DL slot type information in the 6 GHz or less band described in the third embodiment, a detailed description thereof will be omitted.

In addition, the above description is not limited to only the 6 GHz or more band, it can be applied to the 6 GHz or less band, it can be applied to the case of using a single-beam (single-beam, omni-beam).

Hereinafter, a method of setting resources for the common control signal in the 6 GHz or higher band will be described in detail. For the 6 GHz or higher band of the NR system, a method of transmitting a common control signal using a predetermined resource may be considered. Specific methods related to this are as follows.

First, a method (hereinafter, method 1) of transmitting a common control signal through periodic beam sweeping may be considered. In other words, the base station may transmit a common control signal using a plurality of beams. At this time, the base station may transmit a common control signal for each beam, or may transmit a common control signal in units of a beam group composed of a predetermined number of beams.

When using method 1, the overhead for common control signal transmission may be large due to periodic beam sweeping. However, in this case, there is an advantage in that the beam direction used by the terminal to receive the common control signal can also be applied when receiving another signal. That is, when the common control signal is transmitted using the method 1, it is possible to determine the beam (or beam direction) most suitable for the corresponding terminal and to transmit and receive the common control signal.

Alternatively, a method (hereinafter, method 2) of transmitting a common control signal using an omni-beam (ie, a single beam) at a specific time and / or frequency resource may be considered. That is, the base station may transmit a common control signal through a specific time and / or frequency resource region visible to all terminals. Herein, the specific time and / or frequency resource region may be set on the system or may be set (or indicated) through higher layer signaling.

When using the method 2, the beam sweeping procedure is not performed, there is an advantage that all the terminals can see. However, the specific time and / or frequency resource region may be limited to those used for transmitting the common control signal. In this case, a particular time and / or frequency resource region may be located over multiple sub bands.

Alternatively, a method (hereinafter, method 3) of transmitting a common control signal through a beam coinciding with a beam of a control signal may be considered. Here, the control signal may mean a control signal (eg, a control signal for transmitting / receiving data, a reference signal, etc.) that the base station intends to transmit together with the common control signal. That is, after specifying the beam of the terminal, the base station may transmit a common control signal in a beam direction that matches the control signal transmitted in the beam direction to be received by the terminal.

When using method 3, the overhead can be reduced because the beam sweeping procedure for receiving a common control signal can be omitted. However, if the UE does not receive the control signal because there is no data and / or reference signal to transmit and receive in the corresponding subframe, the method cannot be applied. For example, in order to transmit information such as CSI-RS, the common control signal for the corresponding CSI-RS beam may be set to be transmitted together.

Hereinafter, the basic operation of the terminal related to the aforementioned common control signal in the 6 GHz or higher band will be described. For example, the basic operation may mean a fall-back operation.

Hereinafter, in this specification, a basic operation related to transmission of control region information and a basic operation related to transmission of information on CSI-RS transmission will be described in detail. For reference, since a basic operation related to transmission of UL / DL slot type information in a 6 GHz or higher band is similar to that in a 6 GHz or lower band, a detailed description thereof will be omitted.

Basic behaviors related to the transmission of control area information

First, a basic operation (ie, fall-back operation) of a base station and a terminal for transmission of control region information will be described in three steps.

(Step 1)-Default area setting of control area information

First, a default region for the control region information needs to be set. Here, the default region may mean a time and / or frequency resource region in which the control channel is assumed to be transmitted when the terminal does not receive the control region information.

For example, the default area may be set to the largest control area that the terminal may have. In other words, a control region in which the terminal can perform maximum blind decoding (ie, blind detection) may be set as a default region. This is to enable the system to operate even if the corresponding terminal does not receive the common control signal correctly.

In this case, a method of transmitting the common control signal or the beam specific signal may be as follows. For example, the terminal may receive a maximum of M control resource sets. In addition, the UE may receive a blind decoding (that is, the number of blind decoding times) to be performed for each control resource set in advance.

If the terminal obtains on / off information on M control resource sets through a common control signal, the terminal may perform blind decoding on the control resource set set to on. . Through this, the complexity of the blind decoding of the terminal can be reduced. In contrast, when the terminal does not acquire the on / off information, the terminal may be configured to attempt blind decoding for all the M control resource set.

As another example, a method of setting a control area sufficient to receive the service for each type of service transmitted (or applied) in a certain band (ie, a frequency band) may be considered as the default area. That is, the default region may be set differently for each service type supported in a certain band. In this case, the number of blind decoding of the UE for the default region may be reduced as compared with the above-described example. In addition, through this method, even if the terminal does not receive the common control signal correctly, the system can operate.

(Step 2)-transmission of control area information through a common control signal

The base station may transmit the control region information using the methods described above (ie, the method 1 and the method 2 described above). In addition, the base station may be configured to change the preset default operating mode by sending additional information through a common control signal (or other RRC signaling).

(Step 3)-Attempt to receive common control signal

The terminal may attempt to receive a common control signal transmitted from the base station. When the terminal correctly receives the common control signal, the terminal may perform blind decoding in the allocated time and / or frequency domain using the control region information transmitted through the common control signal. In particular, in this case, when the base station allocates a value smaller than the above-described default area to the terminal, the blind decoding overhead of the terminal can be reduced. If the terminal does not receive the common control signal, the terminal may be configured to perform blind decoding in the default region.

Basic behaviors related to the transmission of CSI-RS information

In addition, the basic operation (ie, fall-back operation) of the base station and the terminal for the transmission of the CSI-RS information will be described in three steps. Specifically, when the common control signal carries indication information for the CSI-RS transmission, the basic operation (ie, the default operation) related to the transmission of the CSI-RS information in the resource region where the common control signal is transmitted is as follows. same.

(Step 1)-Default Operation of CSI-RS Information

For example, assuming that CSI-RS information is transmitted, a method of setting the corresponding RE position to rate match (or puncture) may be considered. That is, the UE assumes that the CSI-RS is always transmitted, and may perform rate matching or puncturing the corresponding RE position. Using this method, there is an advantage that the symbol (that is, the symbol including the RE) can be decoded correctly when the actual CSI-RS is transmitted. However, when the CSI-RS is not transmitted, decoding of the corresponding symbol is performed while unnecessary rate matching (or puncturing) is performed, which may be inefficient in terms of data rate.

As another example, a method of estimating that the CSI-RS is not transmitted and performing decoding on a symbol may also be considered. That is, it is assumed that the CSI-RS is not always transmitted, and the UE can decode the corresponding symbol without additional operation such as rate matching or puncturing. Using this method, when the CSI-RS is not transmitted, since the decoding is performed on the symbol without performing an unnecessary operation (for example, rate matching or puncturing), it may be efficient in terms of data rate. However, when the CSI-RS is actually transmitted, an error may occur when decoding the corresponding symbol.

(Step 2)-CSI-RS information transmission through common control signal

The base station may transmit the CSI-RS information using the methods described above (that is, the method 1 and the method 2 described above). In addition, the base station may be configured to change the preset default operating mode by sending additional information through a common control signal (or other RRC signaling).

(Step 3)-Attempt to receive common control signal

The terminal may attempt to receive a common control signal transmitted from the base station. When the UE correctly receives the common control signal, the UE may know whether the CSI-RS is transmitted in the corresponding symbol by using the CSI-RS information transmitted through the common control signal. If the UE knows in advance the RE location where the CSI-RS is transmitted, the UE may perform accurate decoding by performing a rate matching (or puncturing) operation for decoding the corresponding symbol. If the terminal does not receive the common control signal, the terminal may be set to perform the above-described default operation mode.

본 발명이 적용될 수 있는 장치 일반General apparatus to which the present invention can be applied

Referring to FIG. 13, a wireless communication system includes a base station 1310 and a plurality of terminals 1320 located in an area of a base station 1310.

The base station 1310 includes a processor 1311, a memory 1312, and an RF unit 1313. The processor 1311 implements the functions, processes, and / or methods proposed in FIGS. 1 to 7. Layers of the air interface protocol may be implemented by the processor 1311. The memory 1312 is connected to the processor 1311 and stores various information for driving the processor 1311. The RF unit 1313 is connected to the processor 1311 and transmits and / or receives a radio signal.

The terminal 1320 includes a processor 1321, a memory 1322, and an RF unit 1323.

The processor 1321 implements the functions, processes, and / or methods proposed in FIGS. 1 to 12. Layers of the air interface protocol may be implemented by the processor 1321. The memory 1322 is connected to the processor 1321 and stores various information for driving the processor 1321. The RF unit 1323 is connected to the processor 1321, and transmits and / or receives a radio signal.

The

memories

1312 and 1322 may be inside or outside the

processors

1311 and 1321, and may be connected to the

processors

1311 and 1321 by various well-known means.

As an example, in order to transmit and receive downlink data (DL data) in a wireless communication system supporting a low latency service, the terminal is a radio frequency (RF) unit for transmitting and receiving a radio signal, and a functional unit with the RF unit. It may include a processor connected to.

Also, the base station 1310 and / or the terminal 1320 may have a single antenna or multiple antennas.

In particular, FIG. 14 is a diagram illustrating the terminal of FIG. 13 in more detail.

Referring to FIG. 14, a terminal may include a processor (or a digital signal processor (DSP) 1410, an RF module (or an RF unit) 1435, and a power management module 1405). ), Antenna 1440, battery 1455, display 1415, keypad 1420, memory 1430, SIM card Subscriber Identification Module card) 1425 (this configuration is optional), a speaker 1445, and a microphone 1450. The terminal may also include a single antenna or multiple antennas. Can be.

The processor 1410 implements the functions, processes, and / or methods proposed in FIGS. 1 to 12. The layer of the air interface protocol may be implemented by the processor 1410.

The memory 1430 is connected to the processor 1410 and stores information related to the operation of the processor 1410. The memory 1430 may be inside or outside the processor 1410 and may be connected to the processor 1410 by various well-known means.

A user enters command information, such as a telephone number, for example by pressing (or touching) a button on keypad 1420 or by voice activation using microphone 1450. The processor 1410 receives the command information, processes the telephone number, and performs a proper function. Operational data may be extracted from the SIM card 1425 or the memory 1430. In addition, the processor 1410 may display command information or driving information on the display 1415 for the user to recognize and for convenience.

The RF module 1435 is coupled to the processor 1410 to transmit and / or receive RF signals. The processor 1410 communicates command information to the RF module 1435 to, for example, transmit a radio signal constituting voice communication data to initiate communication. The RF module 1435 is composed of a receiver and a transmitter for receiving and transmitting a radio signal. The antenna 1440 functions to transmit and receive wireless signals. Upon receiving a wireless signal, the RF module 1435 may communicate the signal and convert the signal to baseband for processing by the processor 1410. The processed signal may be converted into audible or readable information output through the speaker 1445.

The embodiments described above are the components and features of the present invention are combined in a predetermined form. Each component or feature is to be considered optional unless stated otherwise. Each component or feature may be embodied in a form that is not combined with other components or features. In addition, it is also possible to combine the some components and / or features to form an embodiment of the present invention. The order of the operations described in the embodiments of the present invention may be changed. Some components or features of one embodiment may be included in another embodiment, or may be replaced with corresponding components or features of another embodiment. It is obvious that the embodiments can be combined to form a new claim by combining claims which are not expressly cited in the claims or by post-application correction.

Embodiments according to the present invention may be implemented by various means, for example, hardware, firmware, software, or a combination thereof. In the case of a hardware implementation, an embodiment of the present invention may include one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), and FPGAs ( field programmable gate arrays), processors, controllers, microcontrollers, microprocessors, and the like.

In the case of implementation by firmware or software, an embodiment of the present invention may be implemented in the form of a module, procedure, function, etc. that performs the functions or operations described above. The software code may be stored in memory and driven by the processor. The memory may be located inside or outside the processor, and may exchange data with the processor by various known means.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the essential features of the present invention. Accordingly, the above detailed description should not be construed as limiting in all aspects and should be considered as illustrative. The scope of the invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the invention are included in the scope of the invention.

In the wireless communication system of the present invention, a method for transmitting and receiving data by the terminal has been described with reference to an example applied to a 3GPP LTE / LTE-A system and a 5G system (New RAT system), but can be applied to various wireless communication systems. Do.

Claims

In the method of receiving a system information (system information) in the terminal in a wireless communication system,

Receiving first system information through a first physical channel;

Receiving, via the second physical channel, second system information;

The second system information is remaining system information except for the first system information among the system information for the terminal,

The second physical channel is scheduled through the first physical channel,

And a beam configured to receive the first physical channel is the same as a beam set to receive the second physical channel.
The method of claim 1,

The first physical channel is transmitted by being time division multiplexed with a synchronization signal,

And the second physical channel is transmitted in a specific resource region established through the first physical channel.
The method of claim 2,

The synchronization signal includes a primary synchronization signal and a primary synchronization signal,

And the synchronization signal and the first physical channel are configured as a synchronization signal block.
The method of claim 3, wherein

The resource region to which the sync signal block is transmitted is frequency division multiplexed with the resource region to which paging control information for scheduling a paging signal is transmitted.
The method of claim 1,

The beam index order of beam sweeping applied to the transmission of the first physical channel is the same as the beam index order of beam sweeping to be applied to the transmission of the second physical channel. How to receive information.
The method of claim 1,

The first physical channel includes information indicating a resource region to which downlink control information for scheduling the second physical channel is transmitted.

And receiving the downlink control information and identifying a specific resource region to which the second physical channel is allocated.
The method of claim 1,

The specific resource region to which the second physical channel is allocated is indicated based on the first system information and a cell identifier.
The method of claim 1,

The resource region to which paging control information for scheduling a paging signal is transmitted is frequency division multiplexed with the first physical channel,

The resource region to which the paging signal is delivered is frequency division multiplexed with the second physical channel.
A terminal for receiving system information in a wireless communication system,

A transceiver for transmitting and receiving a wireless signal,

A processor that is functionally connected to the transceiver;

The processor,

Receiving first system information through a first physical channel,

To receive the second system information through the second physical channel,

The second system information is remaining system information except for the first system information among the system information for the terminal,

The second physical channel is scheduled through the first physical channel,

And a beam configured to receive the first physical channel is the same as a beam configured to receive the second physical channel.